Dynamo-ventilator.



D. E.. MOGULLUUGH.

0 2 R p .A um .m a P TTOHNEYS I .To all whom 'it may concern:

vvnew and Improved DynamVentilator, of

description.

, ventilated, and toimeans for effecting an inf machine from moistureand dust.

Y tions, as Well as in other instances when these circuits of excessivetemperature under conditlons of load which invariably augment the y/35mature, I have constructed a housing emsesses certain features ofconstruction described "m 'the annexed specification and f 40illustrated inthe accom anying drawings tion lof these machines undersuch circum- ,DAvIn-vnnsHMccULLoUcH, or rooArnLLo, mino.

Be it known that I, DAVID Rosi; MCUUL- f LOUGH, a citizen of the UnitedStates, and a residentof IPocatello, in `the county of Bannock and Stateof Idaiib, have invented a which the following is a full, clear, andexact M invention relates to means enveloping v-the ynamic elements ofan electric generator or motor, for confining and restricting theventilationof said machine to the parts to be terchan e of air throughsaid parts.

' The o ject of my invention is` first, to pro` tect the dynamo frominjurious heating dur- /ing its operation and second, to maintain itsefficiency in o eration by obviating an increasein the e ectricalresistance due to the excessive heating of its circuits, which other-jwise would fluctuate with the load and entail ka loss of economy, andfurther, to protect the In prsuin these ob'ects my attention wasdirected totiehazar to whichO dynamo electrical machines were subjectedin mining operamachines are operated in locations where molsture anddust exist; and 1n order to circumvent the difficulties attending theopcrastances, aswell as to relieve the electrical yheat ofthe windings,particularly of the arbracing a system of ventilation which posforminpart thereof, an( the distinct fea- 'tu'reso' novelty are moreparticularly referred to in the claim.

`Referring to the drawinvs: Figure 1 is a side elevation of a multipdlardvnamo electrical machine provided with a housingaind air.' inlet pipeleading thereto, a' portion ot'- the housing bein broken away exposing avcntilating fan.' ig. 2 is a vertical sectional elevation of t elhousing Ventilating chamber and'airinlet pi e, the lower portion of theI'dynamo being roken awa Fig. 3 is a front View of a portion of t 1ehousing and regulating shutter.. n

'Similar characters of reference designate l'like parts in both views.,

.Specification of Letters Patent, application sied April 16, 190s. sensiNo. 427,322.

DYNAMO-VENTILATOR.

Patented apni 2o, 1909.

Y A designates a dynamo electrical machine having a plurality of fieldmagnets A', and having mounted for rotation in the usual g manner, thearmature B. Carried by the framework of the dynamo A and secured theretoby screws, is my circulating ventilating housing, which is illustratedon the driving side ol the machine (seeu Fig. 2), as con- Sistiner ofsemi-circular sections D and D.

As will be seen by reference tol Fig. 1, these-z' sections are flangedand secured together' at l their junction on a horizontal line takenthrough the diameterof the machine, Vand these vtwo sections arecentrali perforated' to :fit the journalbox a. The ousing thus disposedforms a wall for the drive side of the dynamo.

The commutator or collector side of the dynamo is provided with-asomewhat similar casing comprising the semi-circular Each of thesesemisections'l)2 and D. circular sections, however, -issomewhatspherical in form and sufficientlydished to extend alongrthe shaft a,73of the 'dynamo to envelopthe collector or commutator C of the oppositeside oi' dynamo areprovided with the outlet openings F and F, which areprovided with regulating shuttersf and f, respectively.

The side E of the fan box is perforated at fte admit of the delivery ofair to the yentilating system. An inlet pipe l which leads from asuitable point where the air is in the desired condition forventilation, is secured to the .side well E' of the fan box at theperforation j', whichlatter' is arranged to register with the pipe l,Mounted upon and secured to the shaft a ofthe dynamo `A is aA-ventilating ian` G, provided with bladesor vanes H, andwhich fan whenvthe shaftis set in rotation is "driven thereby. At the .terminal of'the` pipe I is a hood l provided with a strainer l2 ol' gauze. When thedynamo` A has its armaturekl set in rotation., the ventilationthrou h' mimproved system Will be eected by t ie inhalationof air through the ipeI bythe fan G,

by the ventilator' box bythe said fan into the interior of the housl ingthrough the', inlet perforations F in the n n ring e, effecting a sortof atmospheric shower aving thus described my invention, l in radialstreams, the blast of which will l claim as new and desire to secure byLetters thoroughly circulate between the field mag- @'Patentfnets A andthe armature circuits and other In a Ventilating system embracing a dy-I and the entire construction is simple and ini expnsive.

which airwillbe received l limits of the ventilating capacity of thefanI E and will be propelled l G. The several parts are readilyassembled interstices of the dynamo machine, and will namo electricalmachine, a sectional housing Y be finally expelled from the housingthrough secured the outlet perforations F and F2. The veenvelo locity ofthe air' in circulating through the housin may be regulated by theclosing of the out et perforations more or less by means of the shuttersf and f 2.

to the framework of the machine and ing the electro-dynamic elementsthereoi, a ventilator fan on one side of the machine carried and drivenby the armature haft thereof, a casing inclosing the fan and A providedwith radial erforations opening It will be understood from therforegoing l into the housing, an in et pipe opening at a description oithe construction of my imi point remote from the machine and commuproveddynamo Ventilating system, that all nicatin with the fan casing, andadjustable dust, grit and moisture which may infest the-g shutters inthe housing on The opposite side air in the environments of the dynamo,may from the fan. i .l

be excluded from the working parts' of the i InA testimony whereof Ihave signedmy machine, as the ventilator pipe I may coml name to thisspecification in the presence of municate with a point in the atmospheretwo subscribing witnesses. from which clean and dry air may be drawn, sWhile at the same time the heated portion of i the machine duringoperation may be maintained at such a temperature as desired for theproper Working conditions within the l DAVID RUSH MCCULLOUGH.

Witnesses z EARLE C. WHITE, WILLIAM E. MILLENBERGEI

